\begin{table}
\centering
\begin{tabular}[t]{lccc}
\toprule
  & Model 1 & Model 2 & Model 3\\
\midrule
Graduate & \num{0.046}*** & \num{0.046}*** & \num{0.031}***\\
 & {}[\num{0.042}, \num{0.051}] & {}[\num{0.041}, \num{0.051}] & {}[\num{0.023}, \num{0.039}]\\
Sex & \num{0.004}** & \num{0.004}** & \num{0.004}**\\
 & {}[\num{0.001}, \num{0.006}] & {}[\num{0.001}, \num{0.006}] & {}[\num{0.001}, \num{0.006}]\\
Age & \num{0.001}* & \num{0.000}* & \num{0.000}*\\
 & {}[\num{0.000}, \num{0.001}] & {}[\num{0.000}, \num{0.001}] & {}[\num{0.000}, \num{0.001}]\\
Income (ten cat.) & \num{0.002}** & \num{0.002}** & \num{0.002}**\\
 & {}[\num{0.001}, \num{0.003}] & {}[\num{0.001}, \num{0.003}] & {}[\num{0.001}, \num{0.003}]\\
Children & \num{-0.010}*** & \num{-0.010}*** & \num{-0.009}***\\
 & {}[\num{-0.014}, \num{-0.006}] & {}[\num{-0.014}, \num{-0.005}] & {}[\num{-0.014}, \num{-0.005}]\\
Unemployed & \num{-0.012}*** & \num{-0.012}*** & \num{-0.012}***\\
 & {}[\num{-0.016}, \num{-0.008}] & {}[\num{-0.016}, \num{-0.008}] & {}[\num{-0.016}, \num{-0.008}]\\
Academic\_Freedom at C &  & \num{0.029}*** & \num{0.024}***\\
 &  & {}[\num{0.016}, \num{0.042}] & {}[\num{0.012}, \num{0.037}]\\
Electoral Democracy Score &  & \num{-0.125}* & \num{-0.124}*\\
 &  & {}[\num{-0.223}, \num{-0.026}] & {}[\num{-0.223}, \num{-0.025}]\\
GDP pc(log) &  & \num{-0.070}+ & \num{-0.067}+\\
 &  & {}[\num{-0.140}, \num{0.001}] & {}[\num{-0.138}, \num{0.003}]\\
Population (log) &  & \num{-0.082} & \num{-0.079}\\
 &  & {}[\num{-0.333}, \num{0.169}] & {}[\num{-0.330}, \num{0.171}]\\
Academic Freedom at C * Graduate &  &  & \num{0.029}***\\
 &  &  & {}[\num{0.016}, \num{0.042}]\\
\midrule
Num.Obs. & \num{235849} & \num{235849} & \num{235849}\\
R2 & \num{0.171} & \num{0.172} & \num{0.173}\\
R2 Adj. & \num{0.171} & \num{0.172} & \num{0.172}\\
Std.Errors & by: country\_cohort & by: country\_cohort & by: country\_cohort\\
\bottomrule
\end{tabular}
\end{table}
